Colossal Round Rug Pattern 54" and Jelly Roll Rug Pi Pattern 38"

Approximately 38" or 54" area rug made from one or two Jelly-Rolls, forty-two or eighty 2-1/2" fabric strips required and 100 percent cotton batting.

Colossal Round Rug Pattern Materials Required:
Colossal Round Jelly Roll Pattern by Roma Lambson for R.J. Designs
2 7/8 yards 100% Cotton Batting 90-96" wide or 100 yards 2 1/2" Cotton Bosal Katahdin-on-a-roll here.
Schmetz Chrome Denim Needles 100/16 carded 5 count found here.
2 Jelly Rolls here.
1 Large spool of Thread; at least 2000 yards to blend or contrast with your fabrics

Jelly Roll Rug Pi Pattern Materials Required:
Jelly Roll Rug Pi Pattern by Roma Lambson for R.J. Designs
1 1/2 yards 100% Cotton Batting 90"-96" wide.
Schmetz Chrome Denim Needles 100/16 carded 5 count found here.
1 Jelly Rolls here.
1 Large spool of Thread; at least 1200 yards to blend or contrast with your fabrics

Very Helpful Items:
Clover Wonder Clips 50 ct 
Creative Grids 4 1/2" x 8 1/2" Ruler
Olfa Spinning Rotary Mat 12" x 12"

Here is a great tutorial on making Jelly Roll Rugs.

Here is the official Jelly Roll Rug tutorial.